Original scientific paper
PHENOTYPIC AND GENETIC CORRELATIONS OF MILK AND BUTTERFAT YIELD WITH TRAITS OF BODY CONFORMATION AND TYPE IN THE BLACK AND WHITE CATTLE POPULATION
Dušan Latinović
; Agricultural University in Belgrade, Belgrade,Serbia
Ljubomir Lazarević
; Agricultural University in Belgrade, Belgrade,Serbia
Milovan Katić
; INI "Agroekonomik"-PKB
Petar Stojić
; INI "Agroekonomik"-PKB
Abstract
On the basis of a selected sample of first calving cows at the Agricultural farm "Belgrade", phenotypic and genetic correlations were obtanied. Groups of milk production traits, visually ;assessed body conformation and type (scures from 1 to 9) and body measrements were included. All calculations were based on the fied model of Least Squares Analysis (Ha r v e y ,1985).
Genetic correlations between group of investigated traits were fairly high, positive or negative with an interval from rG = 0,001 to rG = 1,000. Phenotypic correlations were mostly low, positive or negative with an interval from rP = 0,001 to rp = 0,616. A detailed analysis is shown in the tables of results.
More precise conclusions should be based on much larger number of samples using a longer period of time and a wider choice of models. Thus obtained coefficients could be more efficiently afflied in the already existing breeding programs.
Keywords
Hrčak ID:
161934
URI
Publication date:
25.7.1990.
Visits: 638 *